In any case, what you outline is exactly why I raise the question. Do you happen to know how the SSPX investigates each particular case? Pax Vobis lays out a fairly strong case for why ALL new rite ordinations/consecrations should be treated as doubtful. However, if there is some objective way for the SSPX (or anyone else of good faith) to investigate a particular case of ordination/consecration for validity, I am very interested in learning how this is done.
I only know what I've been told repeatedly by different SSPX priests. I think the last time I asked one of the SSPX priests was a year or two ago, and I asked because it was brought up here ion CI.
I can't remember the process they go through in their investigation, but next time I get the opportunity to discuss it with an SSPX priest, I will ask and post it while it is fresh in my mind.
I personally feel the same as most trads, namely, that many or most NO priests are not really priests at all. Thankfully I have no reason to really be concerned about it, so I do not go out of my way to concern myself with it. Fr. Wathen said something along the lines of - whether valid or not, the NO achieved their goal of adding to the chaos, simply by changing the Rite of Ordination. That's all it took.
Beyond that, it is up to the Church to safeguard the sacraments, She's thankfully been doing that for +2000 years, but in order to safeguard anything, you must first presume validity, otherwise She is safeguarding nothing, nothing at all by first presuming invalidity. Right?